So what you're saying is that the real problem of this new media is the lack of control? Hmm. Does that not worry you because who should be in control of the opinion of a population? If I decide to say something on X then are you saying that I should be fact-checked? Why isn't this forum held to the same standards because isn't it the same thing?
These level of standards actually don't apply to the media either and you're wrong on that. You mention fact-checking, quality and tone but the media has never operated on that basis. For a start there have been hundreds of successful criminal prosecutions against the media in the UK to tackle illegal phone hacking, lies, libels, deceptions and press intrusions..... You name it, they've done it.
The closest thing we have to a fact-checked neutral outlet in the UK is the BBC but barely anybody digests their news from the BBC alone. They don't do that because the BBC is neutral and people do not want neutrality which is why both the left and right hate the BBC. The BBC however isn't immune either and is itself littered with controversy and horrific criminal legacies such as with Jimmy Savile.
X however resolves all of this because at the end of the day those standards don't need to apply because they don't matter because you're talking to a person. As in real life you have a choice to ignore that person, call them batshit crazy, or whatever you want. It's absolutely no different to this forum except the audience is on a very different scale and that's probably the real problem.